{"id":681686,"date":"2024-11-25T16:27:01","date_gmt":"2024-11-25T15:27:01","guid":{"rendered":"https:\/\/www.thermal-engineering.org\/?p=681686"},"modified":"2024-11-25T16:27:01","modified_gmt":"2024-11-25T15:27:01","slug":"3-phuong-phap-do-do-dan-nhiet","status":"publish","type":"post","link":"https:\/\/www.thermal-engineering.org\/vi\/3-phuong-phap-do-do-dan-nhiet\/","title":{"rendered":"3 Ph\u01b0\u01a1ng Ph\u00e1p \u0110o \u0110\u1ed9 D\u1eabn Nhi\u1ec7t"},"content":{"rendered":"<p class=\"sidekick\">T\u00ecm hi\u1ec3u v\u1ec1 3 ph\u01b0\u01a1ng ph\u00e1p \u0111o \u0111\u1ed9 d\u1eabn nhi\u1ec7t hi\u1ec7u qu\u1ea3 trong ng\u00e0nh k\u1ef9 thu\u1eadt nhi\u1ec7t, bao g\u1ed3m c\u00e1c k\u1ef9 thu\u1eadt ti\u1ebfp x\u00fac, kh\u00f4ng ti\u1ebfp x\u00fac v\u00e0 k\u1ef9 thu\u1eadt chuy\u00ean s\u00e2u.<\/p>\n<p><img src=\"https:\/\/www.thermal-engineering.org\/wp-content\/uploads\/2024\/07\/3_phuong_phap_do_do_dan_nhiet.png\" alt=\"3 Ph\u01b0\u01a1ng Ph\u00e1p \u0110o \u0110\u1ed9 D\u1eabn Nhi\u1ec7t\" style=\"display: block; margin-left: auto; margin-right: auto;\"\/><\/p>\n<h2>3 Ph\u01b0\u01a1ng Ph\u00e1p \u0110o \u0110\u1ed9 D\u1eabn Nhi\u1ec7t<\/h2>\n<p>\u0110\u1ed9 d\u1eabn nhi\u1ec7t l\u00e0 m\u1ed9t \u0111\u1eb7c t\u00ednh quan tr\u1ecdng c\u1ee7a v\u1eadt li\u1ec7u, li\u00ean quan \u0111\u1ebfn kh\u1ea3 n\u0103ng c\u1ee7a n\u00f3 truy\u1ec1n nhi\u1ec7t. C\u00f3 nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ec3 \u0111o \u0111\u1ed9 d\u1eabn nhi\u1ec7t c\u1ee7a m\u1ed9t v\u1eadt li\u1ec7u, nh\u01b0ng ba ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0: ph\u01b0\u01a1ng ph\u00e1p d\u00e2y n\u00f3ng, ph\u01b0\u01a1ng ph\u00e1p t\u1ea5m n\u00f3ng b\u1ea3o v\u1ec7 v\u00e0 ph\u01b0\u01a1ng ph\u00e1p d\u00f2ng nhi\u1ec7t \u1ed5n \u0111\u1ecbnh. D\u01b0\u1edbi \u0111\u00e2y, ch\u00fang ta s\u1ebd t\u00ecm hi\u1ec3u chi ti\u1ebft v\u1ec1 t\u1eebng ph\u01b0\u01a1ng ph\u00e1p.<\/p>\n<h2>1. Ph\u01b0\u01a1ng Ph\u00e1p D\u00e2y N\u00f3ng<\/h2>\n<p>Ph\u01b0\u01a1ng ph\u00e1p d\u00e2y n\u00f3ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn \u0111\u1ec3 \u0111o \u0111\u1ed9 d\u1eabn nhi\u1ec7t c\u1ee7a c\u00e1c v\u1eadt li\u1ec7u d\u1ea1ng b\u1ed9t, ch\u1ea5t l\u1ecfng v\u00e0 c\u1ea3 ch\u1ea5t r\u1eafn. Qu\u00e1 tr\u00ecnh n\u00e0y bao g\u1ed3m vi\u1ec7c l\u00e0m n\u00f3ng m\u1ed9t d\u00e2y d\u1eabn m\u1ecfng (th\u01b0\u1eddng l\u00e0 b\u1ea1ch kim) \u0111\u01b0\u1ee3c \u0111\u1eb7t trong m\u1eabu v\u1eadt li\u1ec7u. Nhi\u1ec7t \u0111\u1ed9 t\u0103ng c\u1ee7a d\u00e2y d\u1eabn \u0111\u01b0\u1ee3c theo d\u00f5i qua th\u1eddi gian v\u00e0 \u0111\u1ed9 d\u1eabn nhi\u1ec7t c\u1ee7a v\u1eadt li\u1ec7u \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh d\u1ef1a tr\u00ean nhi\u1ec7t l\u01b0\u1ee3ng ph\u00e1t ra t\u1eeb d\u00e2y d\u1eabn.<\/p>\n<p><u1><\/p>\n<li>\u01afu \u0111i\u1ec3m:<br \/>\n        <o1><\/p>\n<li>D\u1ec5 d\u00e0ng th\u1ef1c hi\u1ec7n v\u00e0 thi\u1ebft b\u1ecb kh\u00f4ng \u0111\u1eaft ti\u1ec1n.<\/li>\n<p>        <\/o1>\n    <\/li>\n<li>Nh\u01b0\u1ee3c \u0111i\u1ec3m:<br \/>\n        <o1><\/p>\n<li>\u0110\u1ed9 ch\u00ednh x\u00e1c c\u00f3 th\u1ec3 b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi s\u1ef1 ti\u1ebfp x\u00fac gi\u1eefa d\u00e2y d\u1eabn v\u00e0 m\u1eabu v\u1eadt li\u1ec7u.<\/li>\n<p>        <\/o1>\n    <\/li>\n<p><\/u1><\/p>\n<h2>2. Ph\u01b0\u01a1ng Ph\u00e1p T\u1ea5m N\u00f3ng B\u1ea3o V\u1ec7<\/h2>\n<p>Ph\u01b0\u01a1ng ph\u00e1p t\u1ea5m n\u00f3ng b\u1ea3o v\u1ec7 bao g\u1ed3m \u0111\u1eb7t m\u1eabu v\u1eadt li\u1ec7u gi\u1eefa hai t\u1ea5m kim lo\u1ea1i, m\u1ed9t t\u1ea5m \u0111\u01b0\u1ee3c l\u00e0m n\u00f3ng \u0111\u1ec1u v\u00e0 t\u1ea5m kia \u0111\u01b0\u1ee3c gi\u1eef \u1edf nhi\u1ec7t \u0111\u1ed9 th\u1ea5p h\u01a1n. Nhi\u1ec7t \u0111\u1ed9 c\u1ee7a hai t\u1ea5m n\u00e0y \u0111\u01b0\u1ee3c \u0111o, t\u1eeb \u0111\u00f3 c\u00f3 th\u1ec3 t\u00ednh to\u00e1n \u0111\u01b0\u1ee3c \u0111\u1ed9 d\u1eabn nhi\u1ec7t c\u1ee7a m\u1eabu v\u1eadt li\u1ec7u d\u1ef1a tr\u00ean s\u1ef1 truy\u1ec1n nhi\u1ec7t qua m\u1eabu.<\/p>\n<p><u1><\/p>\n<li>\u01afu \u0111i\u1ec3m:<br \/>\n        <o1><\/p>\n<li>\u0110\u1ed9 ch\u00ednh x\u00e1c cao v\u00e0 ph\u00f9 h\u1ee3p v\u1edbi nhi\u1ec1u lo\u1ea1i v\u1eadt li\u1ec7u kh\u00e1c nhau.<\/li>\n<p>        <\/o1>\n    <\/li>\n<li>Nh\u01b0\u1ee3c \u0111i\u1ec3m:<br \/>\n        <o1><\/p>\n<li>Thi\u1ebft b\u1ecb th\u1ef1c hi\u1ec7n ph\u01b0\u01a1ng ph\u00e1p n\u00e0y kh\u00e1 ph\u1ee9c t\u1ea1p v\u00e0 \u0111\u1eaft ti\u1ec1n.<\/li>\n<p>        <\/o1>\n    <\/li>\n<p><\/u1><\/p>\n<h2>3. Ph\u01b0\u01a1ng Ph\u00e1p D\u00f2ng Nhi\u1ec7t \u1ed4n \u0110\u1ecbnh<\/h2>\n<p>Ph\u01b0\u01a1ng ph\u00e1p d\u00f2ng nhi\u1ec7t \u1ed5n \u0111\u1ecbnh \u0111\u00f2i h\u1ecfi t\u1ea1o ra m\u1ed9t \u0111\u1ed9 ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 \u1ed5n \u0111\u1ecbnh gi\u1eefa hai m\u1eb7t c\u1ee7a m\u1eabu v\u1eadt li\u1ec7u. B\u1eb1ng c\u00e1ch \u0111o nhi\u1ec7t \u0111\u1ed9 \u1edf c\u1ea3 hai m\u1eb7t v\u00e0 d\u00f2ng nhi\u1ec7t qua \u0111\u00f3, c\u00f3 th\u1ec3 t\u00ednh to\u00e1n \u0111\u01b0\u1ee3c \u0111\u1ed9 d\u1eabn nhi\u1ec7t. C\u00f4ng th\u1ee9c \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0:<\/p>\n<p><strong>k = \\frac{Q \\cdot d}{A \\cdot \\Delta T}<\/strong><\/p>\n<p>Trong \u0111\u00f3:<br \/>\n    <o1><\/p>\n<li>k: \u0110\u1ed9 d\u1eabn nhi\u1ec7t<\/li>\n<li>Q: Nhi\u1ec7t l\u01b0\u1ee3ng truy\u1ec1n qua m\u1eabu<\/li>\n<li>d: \u0110\u1ed9 d\u00e0y c\u1ee7a m\u1eabu<\/li>\n<li>A: Di\u1ec7n t\u00edch m\u1eb7t ti\u1ebfp x\u00fac<\/li>\n<li>\\(\\Delta T\\): \u0110\u1ed9 ch\u00eanh l\u1ec7ch nhi\u1ec7t \u0111\u1ed9 gi\u1eefa hai m\u1eb7t<\/li>\n<p>    <\/o1>\n<\/p>\n<p><u1><\/p>\n<li>\u01afu \u0111i\u1ec3m:<br \/>\n        <o1><\/p>\n<li>\u0110\u1ed9 ch\u00ednh x\u00e1c cao v\u00e0 c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng cho nhi\u1ec1u lo\u1ea1i v\u1eadt li\u1ec7u.<\/li>\n<p>        <\/o1>\n    <\/li>\n<li>Nh\u01b0\u1ee3c \u0111i\u1ec3m:<br \/>\n        <o1><\/p>\n<li>Th\u1eddi gian th\u1ef1c hi\u1ec7n l\u00e2u v\u00e0 thi\u1ebft b\u1ecb th\u1ef1c hi\u1ec7n ph\u01b0\u01a1ng ph\u00e1p n\u00e0y th\u01b0\u1eddng ph\u1ee9c t\u1ea1p.<\/li>\n<p>        <\/o1>\n    <\/li>\n<p><\/u1><\/p>\n<h2>K\u1ebft Lu\u1eadn<\/h2>\n<p>Ba ph\u01b0\u01a1ng ph\u00e1p \u0111o \u0111\u1ed9 d\u1eabn nhi\u1ec7t ph\u1ed5 bi\u1ebfn \u2013 ph\u01b0\u01a1ng ph\u00e1p d\u00e2y n\u00f3ng, ph\u01b0\u01a1ng ph\u00e1p t\u1ea5m n\u00f3ng b\u1ea3o v\u1ec7 v\u00e0 ph\u01b0\u01a1ng ph\u00e1p d\u00f2ng nhi\u1ec7t \u1ed5n \u0111\u1ecbnh \u2013 m\u1ed7i ph\u01b0\u01a1ng ph\u00e1p \u0111\u1ec1u c\u00f3 \u01b0u v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m ri\u00eang. L\u1ef1a ch\u1ecdn ph\u01b0\u01a1ng ph\u00e1p ph\u00f9 h\u1ee3p ph\u1ee5 thu\u1ed9c v\u00e0o lo\u1ea1i v\u1eadt li\u1ec7u c\u1ea7n \u0111o, \u0111\u1ed9 ch\u00ednh x\u00e1c y\u00eau c\u1ea7u, c\u0169ng nh\u01b0 thi\u1ebft b\u1ecb v\u00e0 \u0111i\u1ec1u ki\u1ec7n th\u1ef1c hi\u1ec7n. Hi\u1ec3u r\u00f5 v\u1ec1 t\u1eebng ph\u01b0\u01a1ng ph\u00e1p s\u1ebd gi\u00fap c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u v\u00e0 k\u1ef9 s\u01b0 ch\u1ecdn l\u1ef1a ph\u01b0\u01a1ng ph\u00e1p t\u1ed1i \u01b0u \u0111\u1ec3 \u0111o \u0111\u1ed9 d\u1eabn nhi\u1ec7t m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 v\u00e0 ch\u00ednh x\u00e1c nh\u1ea5t.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>T\u00ecm hi\u1ec3u v\u1ec1 3 ph\u01b0\u01a1ng ph\u00e1p \u0111o \u0111\u1ed9 d\u1eabn nhi\u1ec7t hi\u1ec7u qu\u1ea3 trong ng\u00e0nh k\u1ef9 thu\u1eadt nhi\u1ec7t, bao g\u1ed3m c\u00e1c k\u1ef9 thu\u1eadt ti\u1ebfp x\u00fac, kh\u00f4ng ti\u1ebfp x\u00fac v\u00e0 k\u1ef9 thu\u1eadt chuy\u00ean s\u00e2u.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[132],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.4 - 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